dp8390d National Semiconductor Corporation, dp8390d Datasheet - Page 47

• Manufacturer Part Number: dp8390d
• Description: Nic Network Interface Controller
• Manufacturer: National Semiconductor Corporation

15 0 Switching Characteristics
Note 1 The addition of wait states affects the count of deserialized bytes and is limited to a number of bus clock cycles depending on the bus clock and network
rates The allowable wait states are found in the table below (Assumes 10 Mbit sec data rate )
Table assumes 10 MHz network clock
BSCK (MHz)
Symbol
ews
ewr
10
12
14
16
18
20
8
Byte Transfer
0
0
1
1
1
2
2
External Wait Setup to T3
(Note 1)
External Wait Release Time
(Note 1)
of Wait States
Parameter
Word Transfer
1
1
2
2
3
3
4
(Continued)
Wait State Insertion
v
Clock
47
The number of allowable wait states in byte mode can be calculated using
tnw
tbsck
The number of allowable wait states in word mode can be calculated using
W
W
W
(byte mode)
(word mode)
Min
10
15
e
e
e
e
e
Number of Wait States
Network Clock Period
BSCK Period


4 5 tbsck
2 tbsck
5 tnw
8 tnw
b
b
1
1
J
J
Max
TL F 8582 – 45
Units
ns
ns